CA1169783A - Configuration for a disk brake torque tube assembly having replaceable keys and backplate - Google Patents
Configuration for a disk brake torque tube assembly having replaceable keys and backplateInfo
- Publication number
- CA1169783A CA1169783A CA000399624A CA399624A CA1169783A CA 1169783 A CA1169783 A CA 1169783A CA 000399624 A CA000399624 A CA 000399624A CA 399624 A CA399624 A CA 399624A CA 1169783 A CA1169783 A CA 1169783A
- Authority
- CA
- Canada
- Prior art keywords
- brake
- torque tube
- tube
- key
- inboard
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
- F16D55/24—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with a plurality of axially-movable discs, lamellae, or pads, pressed from one side towards an axially-located member
- F16D55/26—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with a plurality of axially-movable discs, lamellae, or pads, pressed from one side towards an axially-located member without self-tightening action
- F16D55/36—Brakes with a plurality of rotating discs all lying side by side
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
- F16D2055/0004—Parts or details of disc brakes
- F16D2055/0058—Fully lined, i.e. braking surface extending over the entire disc circumference
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T403/00—Joints and connections
- Y10T403/70—Interfitted members
- Y10T403/7018—Interfitted members including separably interposed key
- Y10T403/7021—Axially extending
- Y10T403/7024—Longitudinally stepped or tapered
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
Abstract
CONFIGURATION FOR A DISK BRAKE TORQUE TUBE
ASSEMBLY HAVING REPLACEABLE KEYS AND BACKPLATE
ABSTRACT OF THE DISCLOSURE
A unique configuration for a torque tube assembly (100) associated with a disk type brake comprises separable and replaceable keys (60) and a separable and replaceable brake disk backplate (70), The keys (60) are mounted in anti-rotation slots (52,54) at the inboard and outboard ends of the torque tube (50) and bolted to the barrel portion of the torque tube and are characterized by a radial extension (60d) that supports the separable back-plate (70). The torque tube (50) is a formed wrought metal tube that is mounted to the stationary portion of the brake housing (14) via bolts (69) that thread into the inboard end (60a) of the keys (60). In this configuration, the occurence of a defective key and/or backplate does not re-quire replacement of the total torque tube assembly.
ASSEMBLY HAVING REPLACEABLE KEYS AND BACKPLATE
ABSTRACT OF THE DISCLOSURE
A unique configuration for a torque tube assembly (100) associated with a disk type brake comprises separable and replaceable keys (60) and a separable and replaceable brake disk backplate (70), The keys (60) are mounted in anti-rotation slots (52,54) at the inboard and outboard ends of the torque tube (50) and bolted to the barrel portion of the torque tube and are characterized by a radial extension (60d) that supports the separable back-plate (70). The torque tube (50) is a formed wrought metal tube that is mounted to the stationary portion of the brake housing (14) via bolts (69) that thread into the inboard end (60a) of the keys (60). In this configuration, the occurence of a defective key and/or backplate does not re-quire replacement of the total torque tube assembly.
Description
1 16~3 CONFIGUR~TION FOR A DISK BRAKE TORQUE TUBE
ASSEMBLY HAVING REPLACEABLE KEYS AND BACKPLATE
BACKGROUND OF T~ INVENTION
; This invention generally pertains to disk brakes and more particularly to a unique configuration for a torque - tube, drive key, and backplate assembly which may be applied to various type disk brake applications. More speci~`ically, the invention provides a torque tube having separable and replaceable keys and a separable and re-placeable backplate. While the invention will be described herein with regard to aircraft wheel and brake configura-tions, it may as well be applied to other type vehicle disk brakc configurations and various industrial brake applications. The invention therefore, is not considered limited in scope by the specific application illustrated in the drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
Various features and advantages of the invention will be better understood and appreciated from a consid-eration of the following detailed description of the pre-ferred embodiment when taken in conjunction with the accompanying drawings in the several figures in which like parts bear like reference numerals and in which:
FIGURE 1 is a sectional elevational view of a portion of a conventional prior art aircraft wheel and brake assembly, the portions that are pertinent to this inven-tion bein~ shown in solid lines while the non-pertinent portions are shown in ghost lines;
FIGURE 2 is an elevational view, in section, of a portion ol` a torque tube assembly in accordance with this invention;
FIGURE 3 is a partial sectional view as may be taken on line 3-3 of FIGURE 2;
FIGURE 4 is an elevational view of the inboard end showing a portion of the torque tube assembly as may be taken on line 4-4 of FIGIJRE 2; and FIGURE 5 is an elevational view of the outboard end showin~ a portion of the torque tube assembly as may bo taken Oll line 5-5 of FIGURE 2.
J- ~
1 1~9783 lA
'.
By way o~ example, FIGURE 1 of the drawings is illustrativc o~' a conventional prior art aircraft wheel and brake assembly generally indicated by reference numcral 10. Portions which are pertinent to the invention are indicated in solid lines while less pertinent portions arc indicated via ghost lines for the purpose of illu-strating the environment thereof. Very generally, a wheel and brake assembly 10 may include a two-part wheel 12 comprised of an inboard wheel half 12a and an outboard wheel half 12b which are fastened together by a plurality of wheel bolts 12c and mounted for rotation about an axle 14 via a plurality of wheel bearings diagramatically indi-cated at 16. A multi-disk brake assembly generally indi-cated by refercncc numeral 20 may be mounted at the in-board side of the wheel 12 within the wheel cavity formedby thc inboard wheel half 12a. The brake assembly 20 includes a torque tube 30 mounted via a plurality of bolts 32 to a brake housing 3~ having brake actuating means 36 for applyin~ a braking pressure to a pressure plate 38, The pressure plate 38 transmits the braking pressure to a brake stac~ generally indicated by reference numeral 40 ~ 1~97~3 .~ 2 to e~fect braking o~' the wheel 12. Wheel braking action is accomplished by the brake stack 40 comprised o~ alter-nating brake ~isks 42 and ~'riction disks ~ either one o-f which may be keyed ~'or rotation with the wheel 12 or alternatively keyed -to be relatively stationary with the ,. torque tube 30. ~s illustrated in the drawing, the outer periphery ol' the rotatin~ members of the brake stack 40 are keyed to the inne:r periphery of the inboard wheel halL 12a while the inner periphery of' the stationary mem-bers of the stack 40 are keyed to the outer periphery o-P
the -torque tube 30. Thus,, the torque tube 30 plays a - primary role in the braking action and the design and construction o~' it is critical to the e~f'ectiveness of the brake sys-tem.
Conventionally, torque tubes of the prior art as illustrated in FIGURE 1 may comprise a one-piece forged or cast me-tal member 30 that is machined to close tolerances to provide the keyed interconnections for the stationary members Or the brake stack 40. Conventional torque tubes 30 ol' the prior art may also be characterized by an inte-gral backplate 30b that extends radially at an approximate angle o~' 90 degrees with respect to the cylindrical por-tion 30a ot' the tube and which operates to engage the brake stack 40 when a braking pressure is applied at the opposite end by -the actuating means 36 through the pressure plate 38. The prior art torque tube may further be characterized by a tubular portion 30a that carries -the keying elements 30c for engagement with the stationary members o~ the brake s-tack ~0 and these keying elements are conventionally machined in-to the outer peripheral sur-I'ace oL the torque -tube.
Prohlems associa-ted with conventionally forged or cast and machined torque tubes 30 involve the backplate 30b and' the drive key elements 30c. The backplate 30b may develop ~ractures due to the axial ~orce exerted on it and heat buildup during braking while the keys 30c su~fer ~ l~g7~3 `:
weal associated with braking action, In this circumstance, and because the backplate and keys are made as an inte-gral par-t ol' the torque tube, -the total torque tube must - be replace~ to put the brake assembly back into a safe and reliable operating condition, In this respect, the torque tube 30 is usually -the single mos-t expensive ele-ment of a typical brake assembly and therefore replace-ment o-t' it is a major maintenance operation and an ex-pensive proposition.
In view of' the above mentioned disadvantages of the presently used -torque tube, it is in one aspect of the present invention an objec-t to provide a torque tube assembly that eliminates replacement of the total torque tube when failure occurs to the backplate and/or drive key portions ol' the assembly, In another aspect of the invention i-t is an object to provide a torque tube that is more economical to manufac-ture and which does not require extensive machining operations and elaborate inspection techniques to meet rigid aircraft and/or industrial specifications, In another aspect of the invention it is an object -to provide a torque tube assembly that has separable drive keys which may be individually replaced when worn or defective keys are detected.
In still another aspect of the invention it is an ob,ject to provide a torque tube assembly having a sep-arable backplate that may be easily replaced when such backplate suffers fatigue failure and/or other defects, In another aspect of -the invention i-t is an object to provide a torque tube tha-t exhibits a longer service life than experienced with presently used one-piece torque -tubes and wherein -the operational integrity may be more easily tested, and which may be applied to brake assemblies having different diameters and numbers of drive keys.
9~
SUMMARY OF THE INVENTION
This invention provides in a brake assembly having an inboard end and an outboard end including a brake housing at the inboard end, an axle, a rotatable member on the axle at the outboard end, and a multi-disk brake stack of alternating rotating and ` stationary components to provide braking of the rotatable member when subjected to a pressure force on the brake stack, a sub-assembly for stationary mounting with respect to the brake housing to provide torque takeout, keying interconnections, and disk brake backup for the brake stack comprising in combination:
a cylindrically shaped torque tube mounted axially about the axle and having an inboard end as determ,ined by the brake housing and an outboard end as determined by the rotating member, said torque tube - having a plurality of spaced-apart slots in the tube about the periphery of each end wherein each slot at . the inboard end.is axially aligned with a respective slot in the outboard end; and a ~lurality of bar-shaped keys mounted axially on the torque tube in spanned relationship between one of said inboard and one of said outboard slots and engaged within said slots to provide keying interconnections for the stationary components of the brake stack and each said key having a .radial extension at the outboard end to provlde backup for the brake stack when said stack is subjected to a braking ~ressure force, said sub-assembly affixed to the brake housing by a plurality of bolts, each said bolt mounted in the brake housing and threadably engaged within the inboard end of a respective key.
7~3 .
DETAIL~I) r)1~lscRIpTIoN OF TIIR INVENTION
Re~erYing to FI~URES 2 thru 5 o-i the drawings, a -torque -tube assembly in accordance with -this invention is ~enerally indica-ted by re~erence numeral 100. The assembly 100 may be mounted about an aircra~t wheel axle (not shown~ having an axis Ax and orien-ted with respect to an inboard direction indicated by arrow 102 and an out-board dircction indicated by arrow 104. The assembly 100 generally comprises a torque tube member 50, a plurality o~ keys 60 axially aligned about the outer peripheral extent o~ the torque tube, and a brake backplate 70 mounted at the outboard end of the torque tube 50. The elements comprising torque tube 50, keys 60 and backplate 70 are individual and separable members o~ the assembly 100 and collectively replace the single torque tube element 30 illustratcd in FIGURE 1 o~ the drawings.
The torque tube 50 is an open-ended, wrought metal tube having a barrel portion 50a that terminates at the outboard end in a machine-~ormed -~lange 50b extending radially at an approxima-tc angle o~ 90 degrees with re-spect to thc Ax axis. At the inboard end the tube 50a terminates in a machine-~ormed restricted bore 50c that is adapted to moun-t on an axle assembly (not shown) in a conventional manner. The torque tube 50 is characterized by a plurality o~ slots 52 in spaced relationship about the inboard end o~ the tube and by an equal plurality o~
slots 54 in spaced relationship about the outboard end of the tubc 50. Each slo-t 52 at -the inboard end is axially aligned with a slot 54 at -the ou-tboard end o~ the tube.
Thc slots 52,54 are cut or machined into the torque tube 50 and each pair of slots 52,54 are o-~ a dimension such as to receive a drive key 60 in spanned relationship between them and in a substantially locking and anti-rotational arrangemen-t as will be more iully understood and appre-ciated hereina~ter. As mentioned, the torque tube 5p is a :
wrought me-tal tube and in this respect it may comprise a ligh-t gauge s-tock requiring a minimum amount of machining to shapc thc t,uhe to the iinal desixed configuration. It is anti~ipatcd, how~ve~Y, ~hat any hi~h strength metal may bc used Lor ~he torque tube including for example steel and titani-lm. Additional]y, the bore ot' the torque tube 50 may bc machined to Lurther decrease i-ts weight and in this resp~ct a center rib 50e may be provided to mount a supporting disc 51 within -the bore as a strengthening member. Thus, it will be appreciated by those persons skillcd in the brake arts that -the torque tube 50 of this invention is a much more simplified product requiring lower cos-t manufacturing techniques than the presently used one-piece torque tubes.
The torque tube 50 is adapted, by virtue of the slots 52,54, to carry a plurality of keying elements 60 about the ou-ter peripheral surl'ace o-f the barrel portion o-f the tube 50a. The keys 60 are forged or cast, bar-like ele-me~nts that may be made ol' solid bar stock steel or titanium and may be machined such as at 60c to reduce the weight thereof along the lengthwise extent of the bar.
The inboard end 60a o-f each key 60 is characterizec by a protrllsion 62 that depends and locks into the inboard slot 52. The outboard end 60b of each key 60 is charac-terized by a protrusion 64 that depends and locks intothe outboard slot 54. The slots 52,54 therefore provide an anti-rota-tional mounting for each of the keys 60. The keys 60 are -further a:Efixed to the torque tube 50 via bolts 66 that are mounted through holes 56 in the barrel portion 50a ol` the torque~ tube and threaded into matching threadcd holes 68 in the body o-f -the key. When all of the keying elemcnts 60 are mounted and affixed to the torque tube 50 the assembly is bolted -to -the stationary brake - housing 34 via bol-ts 69 that are threaded into each key 60 via threaded bores 60e provided in -the inboard end 60a.
In this manner torque--takeout of the brake assembly is provided by reasorl of the slots 52,5~, bolts 66, and bolts 69.
The keys 60 are fllrther characterized at their out-board extell-t by an e~xt;ension 60d tha-t extends radially outwarclly with L~espect to the Ax axis. As clearly illu-strated in FIGURES 2 and 5 of the drawings, the extension 60d is at an angle of approximately 90 degrees and is oriented within ~he torque tube slot 54 and aligned with the tube flange 50b. The drive key extensions 60d thus provide support :tor the backplate 70 by the number of keys mounted on the torque tube.
The~ backplate 70 is a circular disk having a bore 70a such that -the disk may be mounted on the assembly com-prising the torque tube 50 and keys 60. The backplate 70 has an overall diameter such as to provide sufficient support to a brake stack ("~0" in FIGURE 1) that may be moun-ted on the assembly. As clearly shown in the drawing, -the backplate 70 is supported at the outboard extent by the key extension 60d. The backplate 70 may also be pro-vided with a wear plate face 72 -that may be affixed to the backplate via any conventional fastening means such as for example rivets 7~.
While certain representative embodimen-ts and details have been shown Lor the purpose of illustrating the inven--tion, it will be apparent to those skilled in the art that various changes and modifications may be made therein with-out departing ~rom -the spirit or scope of the invention.
ASSEMBLY HAVING REPLACEABLE KEYS AND BACKPLATE
BACKGROUND OF T~ INVENTION
; This invention generally pertains to disk brakes and more particularly to a unique configuration for a torque - tube, drive key, and backplate assembly which may be applied to various type disk brake applications. More speci~`ically, the invention provides a torque tube having separable and replaceable keys and a separable and re-placeable backplate. While the invention will be described herein with regard to aircraft wheel and brake configura-tions, it may as well be applied to other type vehicle disk brakc configurations and various industrial brake applications. The invention therefore, is not considered limited in scope by the specific application illustrated in the drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
Various features and advantages of the invention will be better understood and appreciated from a consid-eration of the following detailed description of the pre-ferred embodiment when taken in conjunction with the accompanying drawings in the several figures in which like parts bear like reference numerals and in which:
FIGURE 1 is a sectional elevational view of a portion of a conventional prior art aircraft wheel and brake assembly, the portions that are pertinent to this inven-tion bein~ shown in solid lines while the non-pertinent portions are shown in ghost lines;
FIGURE 2 is an elevational view, in section, of a portion ol` a torque tube assembly in accordance with this invention;
FIGURE 3 is a partial sectional view as may be taken on line 3-3 of FIGURE 2;
FIGURE 4 is an elevational view of the inboard end showing a portion of the torque tube assembly as may be taken on line 4-4 of FIGIJRE 2; and FIGURE 5 is an elevational view of the outboard end showin~ a portion of the torque tube assembly as may bo taken Oll line 5-5 of FIGURE 2.
J- ~
1 1~9783 lA
'.
By way o~ example, FIGURE 1 of the drawings is illustrativc o~' a conventional prior art aircraft wheel and brake assembly generally indicated by reference numcral 10. Portions which are pertinent to the invention are indicated in solid lines while less pertinent portions arc indicated via ghost lines for the purpose of illu-strating the environment thereof. Very generally, a wheel and brake assembly 10 may include a two-part wheel 12 comprised of an inboard wheel half 12a and an outboard wheel half 12b which are fastened together by a plurality of wheel bolts 12c and mounted for rotation about an axle 14 via a plurality of wheel bearings diagramatically indi-cated at 16. A multi-disk brake assembly generally indi-cated by refercncc numeral 20 may be mounted at the in-board side of the wheel 12 within the wheel cavity formedby thc inboard wheel half 12a. The brake assembly 20 includes a torque tube 30 mounted via a plurality of bolts 32 to a brake housing 3~ having brake actuating means 36 for applyin~ a braking pressure to a pressure plate 38, The pressure plate 38 transmits the braking pressure to a brake stac~ generally indicated by reference numeral 40 ~ 1~97~3 .~ 2 to e~fect braking o~' the wheel 12. Wheel braking action is accomplished by the brake stack 40 comprised o~ alter-nating brake ~isks 42 and ~'riction disks ~ either one o-f which may be keyed ~'or rotation with the wheel 12 or alternatively keyed -to be relatively stationary with the ,. torque tube 30. ~s illustrated in the drawing, the outer periphery ol' the rotatin~ members of the brake stack 40 are keyed to the inne:r periphery of the inboard wheel halL 12a while the inner periphery of' the stationary mem-bers of the stack 40 are keyed to the outer periphery o-P
the -torque tube 30. Thus,, the torque tube 30 plays a - primary role in the braking action and the design and construction o~' it is critical to the e~f'ectiveness of the brake sys-tem.
Conventionally, torque tubes of the prior art as illustrated in FIGURE 1 may comprise a one-piece forged or cast me-tal member 30 that is machined to close tolerances to provide the keyed interconnections for the stationary members Or the brake stack 40. Conventional torque tubes 30 ol' the prior art may also be characterized by an inte-gral backplate 30b that extends radially at an approximate angle o~' 90 degrees with respect to the cylindrical por-tion 30a ot' the tube and which operates to engage the brake stack 40 when a braking pressure is applied at the opposite end by -the actuating means 36 through the pressure plate 38. The prior art torque tube may further be characterized by a tubular portion 30a that carries -the keying elements 30c for engagement with the stationary members o~ the brake s-tack ~0 and these keying elements are conventionally machined in-to the outer peripheral sur-I'ace oL the torque -tube.
Prohlems associa-ted with conventionally forged or cast and machined torque tubes 30 involve the backplate 30b and' the drive key elements 30c. The backplate 30b may develop ~ractures due to the axial ~orce exerted on it and heat buildup during braking while the keys 30c su~fer ~ l~g7~3 `:
weal associated with braking action, In this circumstance, and because the backplate and keys are made as an inte-gral par-t ol' the torque tube, -the total torque tube must - be replace~ to put the brake assembly back into a safe and reliable operating condition, In this respect, the torque tube 30 is usually -the single mos-t expensive ele-ment of a typical brake assembly and therefore replace-ment o-t' it is a major maintenance operation and an ex-pensive proposition.
In view of' the above mentioned disadvantages of the presently used -torque tube, it is in one aspect of the present invention an objec-t to provide a torque tube assembly that eliminates replacement of the total torque tube when failure occurs to the backplate and/or drive key portions ol' the assembly, In another aspect of the invention i-t is an object to provide a torque tube that is more economical to manufac-ture and which does not require extensive machining operations and elaborate inspection techniques to meet rigid aircraft and/or industrial specifications, In another aspect of the invention it is an object -to provide a torque tube assembly that has separable drive keys which may be individually replaced when worn or defective keys are detected.
In still another aspect of the invention it is an ob,ject to provide a torque tube assembly having a sep-arable backplate that may be easily replaced when such backplate suffers fatigue failure and/or other defects, In another aspect of -the invention i-t is an object to provide a torque tube tha-t exhibits a longer service life than experienced with presently used one-piece torque -tubes and wherein -the operational integrity may be more easily tested, and which may be applied to brake assemblies having different diameters and numbers of drive keys.
9~
SUMMARY OF THE INVENTION
This invention provides in a brake assembly having an inboard end and an outboard end including a brake housing at the inboard end, an axle, a rotatable member on the axle at the outboard end, and a multi-disk brake stack of alternating rotating and ` stationary components to provide braking of the rotatable member when subjected to a pressure force on the brake stack, a sub-assembly for stationary mounting with respect to the brake housing to provide torque takeout, keying interconnections, and disk brake backup for the brake stack comprising in combination:
a cylindrically shaped torque tube mounted axially about the axle and having an inboard end as determ,ined by the brake housing and an outboard end as determined by the rotating member, said torque tube - having a plurality of spaced-apart slots in the tube about the periphery of each end wherein each slot at . the inboard end.is axially aligned with a respective slot in the outboard end; and a ~lurality of bar-shaped keys mounted axially on the torque tube in spanned relationship between one of said inboard and one of said outboard slots and engaged within said slots to provide keying interconnections for the stationary components of the brake stack and each said key having a .radial extension at the outboard end to provlde backup for the brake stack when said stack is subjected to a braking ~ressure force, said sub-assembly affixed to the brake housing by a plurality of bolts, each said bolt mounted in the brake housing and threadably engaged within the inboard end of a respective key.
7~3 .
DETAIL~I) r)1~lscRIpTIoN OF TIIR INVENTION
Re~erYing to FI~URES 2 thru 5 o-i the drawings, a -torque -tube assembly in accordance with -this invention is ~enerally indica-ted by re~erence numeral 100. The assembly 100 may be mounted about an aircra~t wheel axle (not shown~ having an axis Ax and orien-ted with respect to an inboard direction indicated by arrow 102 and an out-board dircction indicated by arrow 104. The assembly 100 generally comprises a torque tube member 50, a plurality o~ keys 60 axially aligned about the outer peripheral extent o~ the torque tube, and a brake backplate 70 mounted at the outboard end of the torque tube 50. The elements comprising torque tube 50, keys 60 and backplate 70 are individual and separable members o~ the assembly 100 and collectively replace the single torque tube element 30 illustratcd in FIGURE 1 o~ the drawings.
The torque tube 50 is an open-ended, wrought metal tube having a barrel portion 50a that terminates at the outboard end in a machine-~ormed -~lange 50b extending radially at an approxima-tc angle o~ 90 degrees with re-spect to thc Ax axis. At the inboard end the tube 50a terminates in a machine-~ormed restricted bore 50c that is adapted to moun-t on an axle assembly (not shown) in a conventional manner. The torque tube 50 is characterized by a plurality o~ slots 52 in spaced relationship about the inboard end o~ the tube and by an equal plurality o~
slots 54 in spaced relationship about the outboard end of the tubc 50. Each slo-t 52 at -the inboard end is axially aligned with a slot 54 at -the ou-tboard end o~ the tube.
Thc slots 52,54 are cut or machined into the torque tube 50 and each pair of slots 52,54 are o-~ a dimension such as to receive a drive key 60 in spanned relationship between them and in a substantially locking and anti-rotational arrangemen-t as will be more iully understood and appre-ciated hereina~ter. As mentioned, the torque tube 5p is a :
wrought me-tal tube and in this respect it may comprise a ligh-t gauge s-tock requiring a minimum amount of machining to shapc thc t,uhe to the iinal desixed configuration. It is anti~ipatcd, how~ve~Y, ~hat any hi~h strength metal may bc used Lor ~he torque tube including for example steel and titani-lm. Additional]y, the bore ot' the torque tube 50 may bc machined to Lurther decrease i-ts weight and in this resp~ct a center rib 50e may be provided to mount a supporting disc 51 within -the bore as a strengthening member. Thus, it will be appreciated by those persons skillcd in the brake arts that -the torque tube 50 of this invention is a much more simplified product requiring lower cos-t manufacturing techniques than the presently used one-piece torque tubes.
The torque tube 50 is adapted, by virtue of the slots 52,54, to carry a plurality of keying elements 60 about the ou-ter peripheral surl'ace o-f the barrel portion o-f the tube 50a. The keys 60 are forged or cast, bar-like ele-me~nts that may be made ol' solid bar stock steel or titanium and may be machined such as at 60c to reduce the weight thereof along the lengthwise extent of the bar.
The inboard end 60a o-f each key 60 is characterizec by a protrllsion 62 that depends and locks into the inboard slot 52. The outboard end 60b of each key 60 is charac-terized by a protrusion 64 that depends and locks intothe outboard slot 54. The slots 52,54 therefore provide an anti-rota-tional mounting for each of the keys 60. The keys 60 are -further a:Efixed to the torque tube 50 via bolts 66 that are mounted through holes 56 in the barrel portion 50a ol` the torque~ tube and threaded into matching threadcd holes 68 in the body o-f -the key. When all of the keying elemcnts 60 are mounted and affixed to the torque tube 50 the assembly is bolted -to -the stationary brake - housing 34 via bol-ts 69 that are threaded into each key 60 via threaded bores 60e provided in -the inboard end 60a.
In this manner torque--takeout of the brake assembly is provided by reasorl of the slots 52,5~, bolts 66, and bolts 69.
The keys 60 are fllrther characterized at their out-board extell-t by an e~xt;ension 60d tha-t extends radially outwarclly with L~espect to the Ax axis. As clearly illu-strated in FIGURES 2 and 5 of the drawings, the extension 60d is at an angle of approximately 90 degrees and is oriented within ~he torque tube slot 54 and aligned with the tube flange 50b. The drive key extensions 60d thus provide support :tor the backplate 70 by the number of keys mounted on the torque tube.
The~ backplate 70 is a circular disk having a bore 70a such that -the disk may be mounted on the assembly com-prising the torque tube 50 and keys 60. The backplate 70 has an overall diameter such as to provide sufficient support to a brake stack ("~0" in FIGURE 1) that may be moun-ted on the assembly. As clearly shown in the drawing, -the backplate 70 is supported at the outboard extent by the key extension 60d. The backplate 70 may also be pro-vided with a wear plate face 72 -that may be affixed to the backplate via any conventional fastening means such as for example rivets 7~.
While certain representative embodimen-ts and details have been shown Lor the purpose of illustrating the inven--tion, it will be apparent to those skilled in the art that various changes and modifications may be made therein with-out departing ~rom -the spirit or scope of the invention.
Claims (14)
1. In a brake assembly having an inboard end and an outboard end including a brake housing at the inboard end, an axle, a rotatable member on the axle at the out-board end, and a multi-disk brake stack of alternating rotating and stationary components to provide braking of the rotatable member when subjected to a pressure force on the brake stack, a sub-assembly for stationary mounting with respect to the brake housing to provide torque takeout, keying interconnections, and disk brake backup for the brake stack comprising in combination:
a cylindrically shaped torque tube mounted axially about the axle and having an inboard end as deter-mined by the brake housing and an outboard end as determined by the rotating member, said torque tube having a plurality of spaced-apart slots in the tube about the periphery of each end wherein each slot at the inboard end is axially aligned with a respective slot in the outboard end; and a plurality of bar-shaped keys mounted axially on the torque tube in spanned relationship between one of said inboard and one of said outboard slots and engaged within said slots to provide keying inter-connections for the stationary components of the brake stack and each said key having a radial exten-sion at the outboard end to provide backup for the brake stack when said stack is subjected to a brak-ing pressure force, said sub-assembly affixed to the brake housing by a plurality of bolts, each said bolt mounted in the brake housing and threadably engaged within the inboard end of a respective key.
a cylindrically shaped torque tube mounted axially about the axle and having an inboard end as deter-mined by the brake housing and an outboard end as determined by the rotating member, said torque tube having a plurality of spaced-apart slots in the tube about the periphery of each end wherein each slot at the inboard end is axially aligned with a respective slot in the outboard end; and a plurality of bar-shaped keys mounted axially on the torque tube in spanned relationship between one of said inboard and one of said outboard slots and engaged within said slots to provide keying inter-connections for the stationary components of the brake stack and each said key having a radial exten-sion at the outboard end to provide backup for the brake stack when said stack is subjected to a brak-ing pressure force, said sub-assembly affixed to the brake housing by a plurality of bolts, each said bolt mounted in the brake housing and threadably engaged within the inboard end of a respective key.
2. The subassembly as set forth in claim 1 wherein each key is affixed to the torque tube via at least one bolt passing through the tube and threadably engaged within the body of the key.
3. The sub assembly as set forth in claim 1 further comprising a backplate disk mounted on the torque tube at the outboard end thereof and abutting the radial extensions of the keys to provide a backpressure plate for the brake stack when subjected to a braking pressure force.
4. The sub-assembly as set forth in claim 3 wherein the backplate disk is also in keying relationship with the keys on the torque tube.
5. the subassembly as set forth in claim 3 wherein the torque tube has a radially extending portion at the outboard end and the outboard end slots are cut through the extension, said radial extension of the tube and radial extensions of the keys providing a continuous radially extending backup for the backplate.
6. The sub-assembly as set forth in claim 1 wherein said torque tube has a radial extension within its bore to provide support to the tube in its mounting on the axle.
7. The sub-assembly as set forth in claim 1 wherein said keys are characterized by inboard and outboard exten-sions in the body of the key which depend into respective inboard and outboard slots, to seat into and engage the slots to provide torque takeout in the application of the brake.
8. The sub-assembly as set forth in claim 1 wherein the tube has a large diameter throughout the substantial portion of its length terminating through a radial portion in a smaller diameter at the inboard end thereof said inboard end slots being cut into the tube through the radial portion and into the large diameter portion.
9. An improved brake assembly having an inboard end and an outboard end including a brake housing at the inboard end, an axle, a rotatable member on the axle at the outboard end, a torque tube mounted about the axle, a multi-disk brake stack of alternating rotating and stationary components, said rotating components keyed for rotation with the rotatable member and the stationary components keyed to the torque tube to provide braking of the rotatable member when subjected to a pressure force on said brake stack, the improvement comprising:
a cylindrically shaped torque tube having an inboard end as determined by the brake housing and an outboard end as determined by the rotatable member and having a plurality of spaced-apart slots within the body of the tube and about its periphery at the inboard and outboard ends thereof, each said slot at the inboard end being axially aligned with a respective slot at the outbard end; and a plurality of bar-shaped separable keys mounted axially on the torque tube, each key in spanned relationship between one of said inboard and one of said outboard slots and engaged within the slots and affixed to the tube via at least one bolt at the approximate midsection of the tube and threadably engaged within the body of the key, each said key having a radial extension at the outboard end thereof to provide backup support for the brake stack when a braking pressure is applied to the inboard end of the stack and each said key having a threaded bore at the inboard end wherein the torque tube and keys are mounted to the brake housing by a plurality of bolts extending through the housing and received within a respective key.
a cylindrically shaped torque tube having an inboard end as determined by the brake housing and an outboard end as determined by the rotatable member and having a plurality of spaced-apart slots within the body of the tube and about its periphery at the inboard and outboard ends thereof, each said slot at the inboard end being axially aligned with a respective slot at the outbard end; and a plurality of bar-shaped separable keys mounted axially on the torque tube, each key in spanned relationship between one of said inboard and one of said outboard slots and engaged within the slots and affixed to the tube via at least one bolt at the approximate midsection of the tube and threadably engaged within the body of the key, each said key having a radial extension at the outboard end thereof to provide backup support for the brake stack when a braking pressure is applied to the inboard end of the stack and each said key having a threaded bore at the inboard end wherein the torque tube and keys are mounted to the brake housing by a plurality of bolts extending through the housing and received within a respective key.
10. The brake assembly as set forth in claim 9 wherein the torque tube is characterized by a radial extension at the outboard end thereof and said outboard slots are cut through said radial extension, the radial extension of the torque tube and the radial extension of the keys providing a continuous radially extending backup for the brake stack.
11. The brake assembly as set forth in claim 10 wherein a separable backplate disk is mounted on the torque tube, at the outboard end thereof, which disk abuts the radial extensions of the keys and torque tube.
12. The brake assembly as set forth in claim 9 wherein the torque tube is characterized by a large diameter through-out the substantial portion of its length terminating through a radial portion in a restricted diameter at the inboard end thereof, said inboard end slots being cut into the tube through the radial portion and into the large diameter portion.
13. The brake assembly as set forth in claim 12 wherein the torque tube is characterized by a radially extending rib within the bore of the tube to provide support of the tube in its mounting about the axle.
14. The brake assembly as set forth in claim 9 wherein each bar-shaped key is mounted on the torque tube via at least two bolts threaded into the body portion of the key at spaced positions along the length of the key and portions of the body of the key outside the influence of the bolts are machined to reduce the weight of the key.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US06/271,343 US4383594A (en) | 1981-06-08 | 1981-06-08 | Configuration for a disk brake torque tube assembly having replaceable keys and backplate |
| US271,343 | 1981-06-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1169783A true CA1169783A (en) | 1984-06-26 |
Family
ID=23035172
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000399624A Expired CA1169783A (en) | 1981-06-08 | 1982-03-29 | Configuration for a disk brake torque tube assembly having replaceable keys and backplate |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US4383594A (en) |
| EP (1) | EP0067113B1 (en) |
| JP (1) | JPS57208328A (en) |
| BR (1) | BR8202991A (en) |
| CA (1) | CA1169783A (en) |
| DE (1) | DE3269145D1 (en) |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4878563A (en) * | 1984-07-13 | 1989-11-07 | The B.F. Goodrich Company | Brake apparatus |
| GB2161560B (en) * | 1984-07-13 | 1988-11-09 | Goodrich Co B F | Wheel and brake assembly |
| US4696376A (en) * | 1986-04-30 | 1987-09-29 | Loral Corporation | Configuration for a disk brake torque tube |
| USRE36363E (en) * | 1987-11-27 | 1999-11-02 | Tilton Engineering | Carbon to carbon friction clutch |
| US5186521A (en) * | 1991-09-24 | 1993-02-16 | Allied-Signal Inc. | Wheel and drive key assembly |
| EP0662201B1 (en) * | 1992-08-13 | 2002-12-11 | Tilton Engineering, Inc. | Carbon to carbon friction mechanism |
| US6109401A (en) * | 1995-02-15 | 2000-08-29 | Itt Manufacturing Enterprises Inc. | Light-weight disc brake |
| US5862890A (en) * | 1996-01-16 | 1999-01-26 | Mcdonnell Douglas Corporation | Restrained aircraft brake apparatus |
| US5931269A (en) * | 1997-04-21 | 1999-08-03 | Alliedsignal Inc. | Aircraft wheel part with corrosion and wear resistance |
| US6752248B2 (en) | 2001-09-04 | 2004-06-22 | Honeywell International Inc. | Multi-disc brake structural asymmetry |
| GB2438633B (en) * | 2006-05-31 | 2010-12-01 | Tisics Ltd | Reinforced splines and their manufacture |
| US8776955B2 (en) * | 2007-02-02 | 2014-07-15 | Warner Electric Technology Llc | Liquid cooled brake with support columns |
| FR2937949B1 (en) * | 2008-11-04 | 2011-05-27 | Messier Bugatti | WHEEL BARREL AND WHEEL SPECIALLY ADAPTED |
| US9850968B2 (en) * | 2014-04-29 | 2017-12-26 | Goodrich Corporation | Torque bar and methods for making |
| US11644071B2 (en) | 2019-07-08 | 2023-05-09 | Honeywell International Inc. | Rotor drive key assembly |
| BR112023022988A2 (en) * | 2021-05-04 | 2024-01-30 | Meggitt Aircraft Braking Systems Corp | TORQUE TUBE |
Family Cites Families (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1556427A (en) * | 1924-09-24 | 1925-10-06 | Brownlipe Gear Company | Clutch consturction having toothed fiber disks |
| GB579172A (en) * | 1942-07-04 | 1946-07-25 | Bendix Aviat Corp | Improvements in or relating to disk brakes |
| US2559885A (en) * | 1947-11-28 | 1951-07-10 | Goodrich Co B F | Disk brake |
| GB651876A (en) * | 1948-04-07 | 1951-04-11 | Dunlop Rubber Co | Improvements in disc brake and wheel assemblies |
| US2764261A (en) * | 1953-04-03 | 1956-09-25 | James H Bridges | Brake disc retainer |
| GB751626A (en) * | 1953-06-05 | 1956-07-04 | Siam | Improvements in disc brakes for wheels |
| GB764097A (en) * | 1953-09-28 | 1956-12-19 | Bendix Aviat Corp | Improvements in or relating to wheel and brake assemblies |
| US3061050A (en) * | 1958-09-03 | 1962-10-30 | Goodrich Co B F | Wheel and brake assembly |
| US3138032A (en) * | 1961-09-25 | 1964-06-23 | Emerson Electric Co | Axially adjustable drive mechanism |
| US3237731A (en) * | 1964-01-23 | 1966-03-01 | Bendix Corp | Disc brake rotor construction |
| US3250349A (en) * | 1964-03-20 | 1966-05-10 | American Brake Shoe Co | Disc brake |
| US3436106A (en) * | 1965-12-17 | 1969-04-01 | Emerson Electric Co | Key drive for sliding hubs |
| FR1523402A (en) * | 1967-03-22 | 1968-05-03 | Hispano Suiza Lallemant Soc | Improvements to multiple disc brakes, especially for aircraft wheels |
| US3727477A (en) * | 1971-05-04 | 1973-04-17 | M Murphy | Power transmission |
| GB1402534A (en) * | 1971-07-27 | 1975-08-13 | Dunlop Ltd | Wheel assemblies |
| GB1402535A (en) * | 1971-07-27 | 1975-08-13 | Dunlop Ltd | Wheel assemblies |
| US3754624A (en) * | 1971-09-17 | 1973-08-28 | Bendix Corp | Flexible key for disc brake |
| GB1443709A (en) * | 1972-12-19 | 1976-07-21 | Dunlop Ltd | Disc brakes |
| US3977631A (en) * | 1975-06-04 | 1976-08-31 | The Boeing Company | Aircraft wheel drive apparatus and method |
| SU566987A1 (en) * | 1976-02-13 | 1977-07-30 | Предприятие П/Я М-5287 | Key joint of a shaft with a bush |
-
1981
- 1981-06-08 US US06/271,343 patent/US4383594A/en not_active Expired - Fee Related
-
1982
- 1982-03-29 CA CA000399624A patent/CA1169783A/en not_active Expired
- 1982-05-24 BR BR8202991A patent/BR8202991A/en unknown
- 1982-05-28 EP EP82630055A patent/EP0067113B1/en not_active Expired
- 1982-05-28 DE DE8282630055T patent/DE3269145D1/en not_active Expired
- 1982-05-28 JP JP57090050A patent/JPS57208328A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| US4383594A (en) | 1983-05-17 |
| EP0067113A2 (en) | 1982-12-15 |
| DE3269145D1 (en) | 1986-03-27 |
| EP0067113A3 (en) | 1983-04-13 |
| EP0067113B1 (en) | 1986-02-19 |
| JPS57208328A (en) | 1982-12-21 |
| BR8202991A (en) | 1983-05-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA1169783A (en) | Configuration for a disk brake torque tube assembly having replaceable keys and backplate | |
| EP0398092B1 (en) | Torque transmitting beam for wheel having brake torque drives | |
| EP0784760B1 (en) | Aircraft brake torque transfer assembly | |
| US7488044B2 (en) | Beam key and wheel assembly including same | |
| EP1903242A2 (en) | A brake carrier | |
| US4028002A (en) | Rotor blade retention system | |
| US6267210B1 (en) | Brake hub with floating rotor | |
| US6752248B2 (en) | Multi-disc brake structural asymmetry | |
| US20040050632A1 (en) | Wheel support for vehicles with disk brakes | |
| US9303705B2 (en) | Brake disc and mounting arrangement for a brake disc | |
| US20110127826A1 (en) | Hub and brake assembly | |
| GB2168618A (en) | Coal crusher removeable segment | |
| US3703817A (en) | Flexible couplings | |
| US4696376A (en) | Configuration for a disk brake torque tube | |
| US4815189A (en) | Method of converting a friction clutch assembly | |
| EP0453075B1 (en) | Improvements relating to wheels incorporating brake discs | |
| EP0705396A1 (en) | Aircraft brake torque transfer assembly | |
| AU2020279225B2 (en) | Hubcap for heavy-duty vehicles | |
| EP0666810B1 (en) | An internal combustion engine for propelling a ship and a flexible coupling for use therewith | |
| EP0143941A2 (en) | Spring entrapment of split wedge floatation device | |
| EP2209611A1 (en) | Coupling for pelleting mill | |
| RU2135392C1 (en) | Braked wheel | |
| CA1302318C (en) | Method of converting a friction clutch assembly | |
| CN115335285A (en) | Aircraft wheel with drive lugs |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |